CListView sorting on data from another table - yii

Question

I have a table that stores information about a role. In that table I have two fields that store the ids from other tables.
Table one: id, rname, pname, idtwo, idthree
Table two: id, twoname
Table three: id, threename
My ClistView displays rname, pname, twoname, threename
With this forums help I was able to use a CListView and display the names from tables two and three.
What I would now like to do is be able to do is create a view where the information is sorted on twoname and aonther view where the data is sorted on threename.
My actionIndex is:
public function actionIndex() {
$dataProvider = new CActiveDataProvider('Staffroleprofile');
$this->render('index', array(
'dataProvider' => $dataProvider,
));
}
and my _view.php is:
<h1>List of SRP's</h1>
<?php
$dataProvider->sort->defaultOrder='rname ASC';
?>
<?php $this->widget('zii.widgets.CListView', array(
'dataProvider'=>$dataProvider,
'itemView'=>'_view',
)); ?>
so the above gives me the data sorted by rname from table one. How would I specify that I want the data to be sorted by the data in table two or three?
Kind regards,
e25taki

Answer 1

If model2 and model3 are the relations for table 2 and 3 respectively in Staffroleprofile, add this to your code
$dataProvider = new CActiveDataProvider('Staffroleprofile');
$criteria=new CDbCriteria;
$criteria->together=true;
$criteria->with=array('model2','model3');
$dataProvider->criteria=$criteria;
$dataProvider->sort->defaultOrder='model2.twoname ASC';
CDbCriteria::together specifies whether the query should be run using a join. If set to false additional queries are run for each record if a relation is required. For more detail go to the API pages for CDbCriteria and CActiveDataProvider

Answer 2

all good now, the code I required was:
$dataProvider = new CActiveDataProvider('Staffroleprofile');
$criteria=new CDbCriteria;
$criteria->together=true;
$criteria->with=array('sitename','businessname');
$dataProvider->criteria=$criteria;
$dataProvider->sort->defaultOrder='sitename.site ASC';
$this->render('index_bysite', array(
'dataProvider' => $dataProvider,
));
so, you get ba handle to the records from the Staffrleprofile model and then add the criteria for the sorting, in this case it was based on a relation.
Thank you all for your assistance. Another little step in my Yii learning adventure.
Cheers!
e25taki